would it be possible to take something like this HR-2PS - SmartAVI HDMI 2x1 Switch. Includes: [HR-2P & PS5VDC1A-C] and make it so that it would automatically switch between inputs after a certain amout of time? I run a pawn shop and would like to use one screen to show ads and my security camera feeds. the security camera feeds are a good deterent but don't need to be running on the screen 24/7. so if i had a power point running for say 5 min and then it switch to the cam feeds for say 2 mins that would be nice. can it be done?